package com.zhuang.jdk8.java8;

import java.time.DayOfWeek;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.OffsetDateTime;
import java.time.Period;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAdjusters;
import java.util.Set;

public class TestLocalDateTime {

	public static void main(String[] args) {
		TestLocalDateTime testLocalDateTime = new TestLocalDateTime();
		testLocalDateTime.test1();
		testLocalDateTime.test2();
		testLocalDateTime.test3();
		testLocalDateTime.test4();
		testLocalDateTime.test5();
		testLocalDateTime.test6();
		testLocalDateTime.test7();
	}
	// 6.ZonedDate、ZonedTime、ZonedDateTime ： 带时区的时间或日期

	public void test7() {
		LocalDateTime ldt = LocalDateTime.now(ZoneId.of("Asia/Shanghai"));
		System.out.println(ldt);

		ZonedDateTime zdt = ZonedDateTime.now(ZoneId.of("US/Pacific"));
		System.out.println(zdt);
	}

	public void test6() {
		Set<String> set = ZoneId.getAvailableZoneIds();
		set.forEach(System.out::println);
	}

	// 5. DateTimeFormatter : 解析和格式化日期或时间

	public void test5() {
//		DateTimeFormatter dtf = DateTimeFormatter.ISO_LOCAL_DATE;

		DateTimeFormatter dtf = DateTimeFormatter.ofPattern("yyyy年MM月dd日 HH:mm:ss E");

		LocalDateTime ldt = LocalDateTime.now();
		String strDate = ldt.format(dtf);

		System.out.println(strDate);

		LocalDateTime newLdt = ldt.parse(strDate, dtf);
		System.out.println(newLdt);
	}

	// 4. TemporalAdjuster : 时间校正器

	public void test4() {
		LocalDateTime ldt = LocalDateTime.now();
		System.out.println(ldt);

		LocalDateTime ldt2 = ldt.withDayOfMonth(10);
		System.out.println(ldt2);

		LocalDateTime ldt3 = ldt.with(TemporalAdjusters.next(DayOfWeek.SUNDAY));
		System.out.println(ldt3);

		// 自定义：下一个工作日
		LocalDateTime ldt5 = ldt.with((l) -> {
			LocalDateTime ldt4 = (LocalDateTime) l;

			DayOfWeek dow = ldt4.getDayOfWeek();

			if (dow.equals(DayOfWeek.FRIDAY)) {
				return ldt4.plusDays(3);
			} else if (dow.equals(DayOfWeek.SATURDAY)) {
				return ldt4.plusDays(2);
			} else {
				return ldt4.plusDays(1);
			}
		});

		System.out.println(ldt5);

	}

	// 3.
	// Duration : 用于计算两个“时间”间隔
	// Period : 用于计算两个“日期”间隔

	public void test3() {
		Instant ins1 = Instant.now();

		System.out.println("--------------------");
		try {
			Thread.sleep(1000);
		} catch (InterruptedException e) {
		}

		Instant ins2 = Instant.now();

		System.out.println("所耗费时间为：" + Duration.between(ins1, ins2));

		System.out.println("----------------------------------");

		LocalDate ld1 = LocalDate.now();
		LocalDate ld2 = LocalDate.of(2011, 1, 1);

		Period pe = Period.between(ld2, ld1);
		System.out.println(pe.getYears());
		System.out.println(pe.getMonths());
		System.out.println(pe.getDays());
	}

	// 2. Instant : 时间戳。 （使用 Unix 元年 1970年1月1日 00:00:00 所经历的毫秒值）

	public void test2() {
		Instant ins = Instant.now(); // 默认使用 UTC 时区
		System.out.println(ins);

		OffsetDateTime odt = ins.atOffset(ZoneOffset.ofHours(8));
		System.out.println(odt);

		System.out.println(ins.getNano());

		Instant ins2 = Instant.ofEpochSecond(5);
		System.out.println(ins2);
	}

	// 1. LocalDate、LocalTime、LocalDateTime

	public void test1() {
		LocalDateTime ldt = LocalDateTime.now();
		System.out.println(ldt);

		LocalDateTime ld2 = LocalDateTime.of(2016, 11, 21, 10, 10, 10);
		System.out.println(ld2);

		LocalDateTime ldt3 = ld2.plusYears(20);
		System.out.println(ldt3);

		LocalDateTime ldt4 = ld2.minusMonths(2);
		System.out.println(ldt4);

		System.out.println(ldt.getYear());
		System.out.println(ldt.getMonthValue());
		System.out.println(ldt.getDayOfMonth());
		System.out.println(ldt.getHour());
		System.out.println(ldt.getMinute());
		System.out.println(ldt.getSecond());
	}

}
